<!--
 * @Description: 
 * @Author: 赵华宇
 * @Date: 2025-04-22 20:19:23
 * @LastEditors: 赵华宇
 * @LastEditTime: 2025-04-22 20:26:50
-->
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>塌陷问题</title>
    <style>
        .father{
            width: 300px;
            height: 300px;
            background-color: pink;
            /* padding-top: 50px; */
            /* box-sizing: border-box; */
            /* 内容溢出隐藏 */
            /* overflow: hidden; */
            border-top: 1px solid red;
        }
        .son{
            width: 100px;
            height: 100px;
            background-color: orange;
            margin-top: 50px;
        }
    </style>
</head>
<body>
    <div class="father">
        <div class="son">son</div>
    </div>
</body>
</html>